// 接口地址:https://api.apiopen.top/getJoke

// 1.创建对象
const p = new Promise((resolve, reject) => {
  const xhr = new XMLHttpRequest();
  xhr.open('GET', "https://api.apiopen.top/getJoke");
  xhr.send();
  xhr.onreadystatechange = function () {
    if (xhr.readyState == 4) {
      if (xhr.status >= 200 & xhr.status < 300) {
        resolve(xhr.response);
      } else {
        reject(xhr.status);
      }
    }
  }
})

p.then(value => {
  console.log(value);
}, reason => {
  console.log(reason);
})
